// where b.y is null" - in this case the selector b
// must not use an index condition on "y is null"
// (".. is null" must be written as "not .. is not null").
if (queryConstraint != null) {
queryConstraint.restrict(f);
FullTextExpression ft = queryConstraint.getFullTextConstraint(this);
f.setFullTextConstraint(ft);
}
if (selectorCondition != null) {
selectorCondition.restrict(f);
}